Scheme Art is a portable scheme compiler written in C++ that uses adaptive systems (chaos theory) and AI libraries for compiling and interpreting (at runtime.) It was originally devised as a Web REPL implemented in PHP code.

HGL is a compiler/interpreter suite for developing images. It features its own simple but powerful language, Lua integration, output in various formats as well as runtime input handled by plugins, and easy integration into various environments like Web servers or graphical applications. The input is taken from a source file, which has to be compiled for quick and frequent access by the interpreter. An interpreter then runs the compiled files, takes input from custom plugins (if neccessary), and outputs its result via custom plugins.

PH7 is an in-process software library that implements a highly-efficient embeddable bytecode compiler and a virtual machine for the PHP programming language. It implements most PHP 5.3 constructs, including heredoc, nowdoc, gotos, classes, anonymous functions, and closures, along with powerful extensions such as function overloading, comma expressions, full type hinting, string comparison operators, and more. It is the ideal library for enhancing your application or device (such as router or set-top box) with dynamic Web interfaces, with the benefits and power of PHP and without the overhead incurred by process creation. As an embedded interpreter, it allows multiple interpreter states to coexist in the same program, without any interference between them.

Arcueid is a C interpreter for Paul Graham's Arc dialect of Lisp. It is intended to be compatible with the Arc 3.1 release, with a simple interface to C, and is easily usable as an embedded interpreter or an extension language.

Forxx is a language for text processing, inspired by Forth and REXX. It is a stack-based, extensible language which provides both an interactive environment and the ability to compile and run programs.

Tiny BASIC for Curses (tinybc) is a BASIC interpreter for the curses character screen handling library which fully corresponds to the Tiny BASIC specification. The engine is thread-safe and can be embedded into other code. It can be used as a game or a minimalist challenge.

Alore is an object-oriented programming language with a clean syntax that resembles Python and Lua. It is optionally-typed like Google Dart. It is both a dynamic scripting language and a general-purpose language
with static typing. It is aimed at most programming tasks, from short scripts to complex applications. It allows programmers to freely mix static and dynamic typing within a program. It has native threads and a very fast edit-test cycle. Programmers can always bypass type checking and run their programs immediately.